New PICDEM2 LCD problem

[PCM programmer]

I'm going to wait until I get my new board later this week. I will then
test it and post the results. I'm not going to post anything before that.

[mindstorm88]

Hello PCM , on friday i received my lcd replacement or should i say a complete picdem2 replacement from Microchip, so before i send back the suspected defective one , i would like to confirm that it is bad!! , is it possible for you to send me by email the recommendation you got from ocular ?? so this way they won't be posted before your own testing !!

Thanks

[PCM programmer]

There are two problems.

I ordered one of the new PicDem2-Plus boards from Digikey and it
arrived last Thursday. But when I opened the package I discovered
they had sent me the old-style board (the non "Rohs update" type).
I already have two of those. So I sent the new one back on an RMA
the same day. I 've emailed Digikey to ask if they're going to send
me the Rohs version. No reply yet.

After that happened, I decided to spend some time studying the sample
driver that Ocular tech support gave me. But I found a bug.
Their status routine doesn't return the proper value of the status byte
due to a bug in the way they combine the upper and lower nybbles.
Their routine always returns 0 or 1. So when they test the top bit
for status, it's always "not busy". The execution time of the code
in the status routines probably adds up to about 40 usec with a 4 MHz
crystal, so effectively their driver is doing a fixed delay for "busy".
That's probably why it works. I emailed Ocular about this on Friday
morning but I haven't received a response yet.

[mindstorm88]

Ok , some results !!! new replacement board has exactely same behavior as the other one !!! so the problem is in the lcd design i guess , timing seem to be very sensitive , i tried another program and on power up diplay is missing few first characters , does the same just with a mclr !!!

i hope PCM you'll get yours soon !!!

[mindstorm88]

HI PCM , i did add a 5ms delay at the end of the lcd_init() , result no more missing character at power up , this display seems to be slower than standard !!!